$username = Put the Username for login in your TaskAdmin page.
$password = Put the password for the Username used to login in TaskAdmin page.

Just save this in a file as Authentication.php. Now create another file like this:

<?php

include "Authentication.php";

?>

<html>

<head>

<title>Title</title>

<?php header("Content-Type: text/html; charset=ISO-8859-1",true);?>

</head>

</html>

Just use your own info in those above parameters.

Save this file as test.php in the same folder that you saved your Authentication.php.
Those files must be saved inside your Apache PHP folder. If you use Xampp, is must be saved inside the htdocs folder.